diff --git a/PROMS/Volian.Controls.Library/StepRTB.cs b/PROMS/Volian.Controls.Library/StepRTB.cs
index f617007f..80b55408 100644
--- a/PROMS/Volian.Controls.Library/StepRTB.cs
+++ b/PROMS/Volian.Controls.Library/StepRTB.cs
@@ -2223,6 +2223,9 @@ namespace Volian.Controls.Library
 						{
 							hasEquation = true;
 						}
+						/// B2020-051: Don't allow pasting of a mathtype equation into an item that isn't the correct type
+						if (iData.GetDataPresent("Embed Source")) hasEquation = true;   // mathtype
+
 						if (MyItemInfo != null && MyItemInfo.IsRtfRaw && MyItemInfo.FormatStepData.Type.ToUpper().Contains("EQUATION") && !hasEquation)
 						{
 							FlexibleMessageBox.Show("Cannot paste non-equation data into an equation step type.", "Invalid data", MessageBoxButtons.OK);